I love big Lego items and decided to make my own big lego flower :) Scale as needed and print ... lots of them!
I printed mine in PLA.
Update (2017/06/08): Waldamore designed a little test piece to see how well the flowers will fit on the stem, before you spend many hours printing the stem. It's worth checking out, especially if your planning on going big :) Check it out https://www.thingiverse.com/thing:2371648.
Update (2017/05/11): added a flower stl that is flat on the print bed for those that can't adjust it in their slicer. :)
Flower printed without support, stem needs some support.